[CentOS] CentOS mailserver and spam filter setup ideas &preferences

Scot L. Harris webid at cfl.rr.com
Wed Nov 30 19:02:36 UTC 2005

On Wed, 2005-11-30 at 11:33, Robert wrote:

> having built many mailservers i will be ok in general yet what i am really
> looking for now is how is everyone here filtering "spam in languages other
> than English"... most of the spam i get is in Spanish.
> i am having a hard time finding it googling (other than Bayesian filters)
> and i just need some searching help or direction to find so i can study up
> please?

One option that will eliminate 95%+ spam that is available for most MTAs
is greylisting.  The combination of greylisting and spamassassin blocks
nearly 100% of spam.  The added benefit of greylisting is that your
system's load won't be pushed due to overhead of running spamassassin on
the vast majority of messages.  

I implemented milter-greylist/sendmail/procmail on a system for a small
company and reduced the number of spam messages from around 8000 a day
to about 10 or 15 a day, and those were caught by spamassassin.

You might want to check out http://www.rulesemporium.com/ they have a
number of very good rules sets and possibly some examples that may help
you write specific rules for the spam you are receiving.

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